Does color-magnetic interaction induce short-range diquark correlations in the proton?

Color-magnetic interaction with a smearing function found from the fit to the p-π splitting is strong enough to support a bound state of a single qanti q pair. We present some piloting calculations in order to illustrate the eigenenergy dependence on the cutoff parameter for different choices of the smearing function. In the three-quark system the spin-spin interaction can lead to the existence of the short-range correlations in each 1S0 qq subsystem, thereby providing the dynamical mechanism for the quark-diquark picture of the proton. (orig.)